An advertiser notices that increasing their budget for a specific ad product shows diminishing returns in the reach curve on Ads Planner. What should they do?

Ads Planner reach curves help show when additional spend on one ad product may produce less incremental reach. Diminishing returns indicate that the current allocation is becoming less efficient for expanding audience exposure. Reallocating budget across other ad products can improve total reach by finding additional audience opportunities. This supports a more balanced media mix instead of concentrating spend where incremental reach is flattening.